 Spring rate advice |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| BlueRidge914 |
 Sep 17 2024, 06:25 AM
Post
#1
|
|
Newbie  Group: Members Posts: 15 Joined: 18-January 21 From: Ontario, Canada Member No.: 25,093 Region Association: None  |
I’d be grateful for some spring rate advice for my vintage race 914.
It’s a narrow body 2L six, 205/50 tires all around. Front torsion bars with adjustable sway bar. Rear is Bilstein Sports with adjustable spring perches, and a fixed sway bar. My personal preference leans to a relatively softer spring all around. Any recommendations for both torsion bar size and rear spring rate? Thanks! Gavin VARAC #58 |
   |
 
|
  |
Replies
| Thorshammer |
Jan 29 2026, 08:29 PM
Post
#2
|
|
Senior Member Group: Members Posts: 754 Joined: 11-November 03 Member No.: 1,335 |
There’s a bit more to consider when choosing spring rates.
What bushings/bearings Are the rear trailing arms reinforced properly (and that’s not by wrapping them in 10+ lbs of perforated steel) The anti roll bars: what are they riding in, and how well do they rotate and is their geometry reasonable Are the shocks standard off the shelf… remember, if the rebound isn’t matched to the spring rate, there can be a some negative heave effect. So, in some cases, if you can’t control the heave, due to an insignificant damper, choosing a spring rate that matches the damper, will yield better performance overall However: 21/225 or 21/250 works nicely IMO |
|
|
|
Posts in this topic
BlueRidge914 Spring rate advice Sep 17 2024, 06:25 AM
brant What diameter front torsion springs do you have?
... Sep 17 2024, 01:32 PM BlueRidge914 It was more than twenty years ago since I installe... Sep 17 2024, 07:15 PM slivel I believe that you get performance gains by going ... Sep 18 2024, 02:26 PM
campbellcj
I believe that you get performance gains by going... Sep 23 2024, 01:47 PM yeahmag What type of racing? What tires? Do you have an LS... Sep 20 2024, 03:31 PM BlueRidge914 Tires are 205/50x15 all around, treaded - no slick... Sep 23 2024, 05:02 AM BlueRidge914 That is great advice - thanks. And sort of what I ... Sep 23 2024, 03:48 PM yeahmag I think what Chris says is a good place to start. ... Oct 2 2024, 04:47 PM BlueRidge914
There’s a bit more to consider when choosing sp... Jan 31 2026, 01:37 PM slivel So to answer your questions:
Rear trailing arms we... Jan 31 2026, 02:17 PM BlueRidge914
So to answer your questions:
Rear trailing arms w... Jan 31 2026, 04:49 PM Thorshammer Ok,
The next step is a leap in faith, also in mo... Feb 2 2026, 08:37 PM brant
Ok,
The next step is a leap in faith, also in m... Feb 3 2026, 08:34 AM yeahmag I ran the rear roller bearings and greatly prefer ... Feb 3 2026, 03:35 PM BlueRidge914 Much to consider - thanks.
Answering above: stock... Feb 5 2026, 01:24 PM |
8 User(s) are reading this topic (8 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 5th April 2026 - 10:52 AM |
Invision Power Board
v9.1.4 © 2026 IPS, Inc.